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首页> 外文期刊>South-East European Forestry >Regeneration and Early Tending of Black Locust (Robinia pseudoacacia L.) Stands in the North-West of Romania
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Regeneration and Early Tending of Black Locust (Robinia pseudoacacia L.) Stands in the North-West of Romania

机译：罗马尼亚西北部的黑刺槐（Robinia pseudoacacia L.）林木的更新和早期趋向

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Background and Purpose: The aim of this study is to highlight the importance of black locust (Robinia pseudoacacia L.), a North American-originating tree species of major importance in Romania, in extreme site conditions such as sand dunes. In this respect, a Research and Development (R&D) project has been carried out in Carei-Valea lui Mihai Plain (north-west of Romania) since 2016. Materials and Methods: Three sub-compartments were selected in IV Valea lui Mihai Working Circle, S?cueni Forest District: two pure natural regenerations by root suckers of black locust at different ages (sub-compartments 3B and 52A%) and a mixed black locust - black cherry stand (sub-compartment 23D). Biometrical measurements and analyses as well as biomass estimations were performed. A thorough statistical analysis using the data on initial, extracted and residual trees/stands was also performed. Results: The main outputs of the project are as follows: (1) Black locust was established naturally by root suckers and the stocking of newly established stands can be as high as 50,000 suckers·ha-1; (2) The initial growth of black locust regeneration is quick and the young regeneration can close the canopy in 1-2 years, resulting in an appropriate dune fixation and wind erosion control; (3) The young pure or mixed black locust-dominated stands are left untended until the first cleaning-respacing (mean diameter 5-6 cm), when the stand shows high stocking/density and a wide variation in tree size. This intervention is from below, heavy (intensity over 25% by number of trees or basal area) and of negative selection type, removing mostly low Kraft’s class, dead or dying, and defective trees. Conclusions: This R&D project has shown the high potential of black locust to establish naturally by root suckers after a low coppice cut and stump removal, as well as the fast initial growth of regenerated black locust. The quick canopy closure of young regeneration results in an appropriate dune fixation and wind erosion control.
机译：背景与目的：本研究的目的是强调刺槐（Robinia pseudoacacia L.）的重要性。刺槐是北美起源的罗马尼亚树种，在罗马尼亚等极端场地条件下极为重要。在这方面，自2016年以来，在Carei-Valea lui Mihai平原（罗马尼亚西北部）开展了一个研究与开发项目。材料和方法：在IV Valea lui Mihai工作圈中选择了三个小组。 ，S？cueni森林区：由不同年龄的黑刺槐根吸盘（子隔间3B和52A％）和混合的黑刺槐-黑樱桃林（子隔间23D）进行两次纯天然更新。进行了生物特征测量和分析以及生物量估计。还使用原始，提取和残留树木/林分的数据进行了彻底的统计分析。结果：该项目的主要成果如下：（1）刺槐是自然根系吸盘生的刺槐，新建立的林分蓄积量可高达50,000吸盘·ha-1。 （2）刺槐再生初期生长快，幼龄再生可在1-2年内关闭树冠，从而适当固定沙丘并控制风蚀; （3）当纯林木或杂种黑色蝗虫为主的幼林放养/密度高且树木大小差异较大时，直到第一次清理间隔（平均直径为5-6厘米）之前，都不会进行处理。这种干预是从下面进行的，是沉重的（强度超过树木或基础面积的25％），并且是负面选择类型，主要清除了卡夫等级低，已死或垂死和有缺陷的树木。结论：该研究项目显示，在低矮的灌木丛和残肢去除后，根吸盘可以自然地建立刺槐的潜力，以及再生黑刺槐的初期快速生长。幼树再生的天篷快速闭合导致适当的沙丘固定和风蚀控制。

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